The generated enum class cannot be compiled

[stevehu]

To reproduce.

Get the latest light-codegen in the master branch or 1.6.x branch and build. Then go to /tmp/openapi folder to compile the generated test application.

The following lines are invalid in Income.java

        ___OAS_ (""Ontario Age Service"}"), 
        ___CPP_ (""Canada pension plan"}"); 

[stevehu]

This might be related to the #372

[stevehu]

The generated enum class cannot be compiled 1.6.x

[stevehu]

The generated enum class cannot be compiled master